Issue tooltip will not disappear when going back to the previous page.
A black tooltip with the title is shown when a user hovers over a link to another issue ( e.g. #3211 (closed)). When a user clicks on the link it will navigate to that issue. When the user clicks on the back button they will go back to the previous page and the black tooltip it still shown. In Chrome (53.0.2785.116) it will disappear when the user hovers over the link but in Firefox (48.0.2) and Edge (38.14393.0.0) the tooltip will stay under the link. It will only disappear after a refresh of the page.
@markglenfletcher: Can you take a look at this so we don't have to wait for the auto close